Replace Khmer carrier texts with graphic logos. Configured INTERNET and MMS for Mobitel, Hello, Beeline, Mfone, Metfone, Star-Cell and qb. Tested on all iPhone OS 3.1 - 3.1.2
Reboot!!
Ohhh if you use TIME-BASED INTERNET PACKAGE like qb "3c/mn", maybe you should disable GPRS/EDGE or remove APN in (Settings -> General -> Network -> Cellular Data Network)
Required CommCenter Patch for iOS 4+